package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品
     *
     * @param dishDTO
     */
    @Transactional  //开启事务管理
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish); //添加菜品信息

        Long id = dish.getId();//获取菜品id

        List<DishFlavor> flavors = dishDTO.getFlavors();//口味信息
        if (flavors != null || flavors.size() > 0) {
            //int a=1/0;
            flavors.forEach(flavor -> flavor.setDishId(id));
            dishFlavorMapper.insert(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> p = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(p.getTotal(), p.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        if (ids == null || ids.size() <= 0) throw new DeletionNotAllowedException("请选中删除列表");
        List<Dish> list = dishMapper.selectByIds(ids);
        for (Dish dish : list) {
            if (dish.getStatus() != 0) throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }

        Integer count = setmealDishMapper.CountByDishIds(ids);
        if (count > 0) throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

        dishMapper.deletes(ids);
        dishFlavorMapper.deletes(ids);
    }

    /**
     * 根据id查询菜品和口味
     *
     * @return
     */
    public DishVO queryWithFlavorById(Long id) {
        Dish dish = dishMapper.selectById(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);

        List<DishFlavor> list = dishFlavorMapper.selecetByDishId(id);
        dishVO.setFlavors(list);
        return dishVO;
    }

    /**
     * 修改菜品
     *
     * @param dishDTO
     */
    @Transactional
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);

        dishFlavorMapper.delete(dish.getId());
        dishFlavorMapper.insert(dishDTO.getFlavors());
    }


    /**
     * 菜品起售和停售
     *
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    public List<Dish> queryByCategoryId(Long categoryId) {
        List<Dish> list = dishMapper.selectBycategoryId(categoryId);
        return list;
    }


    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.selecetByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
